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how to get an xtext expression as a java string from an ecore object [message #1732176]

Fri, 13 May 2016 09:35

Alexandre Le Borgne

Messages: 2
Registered: May 2016

Junior Member

Hi!

I'm currently trying to develop a sirius graphical editor with Xtext integration.

I wrote an Xtext grammar that derived my ecore metamodel so everything is good so far.

The problem I'm now facing is that I would like to be able to represent one of my Xtext concepts as a Java string in my graphical editor.

For instance:
Let's say we have a simple xtext expression like
Expression :
(left = INT op='+' right=Expression)
| Expression1;
(with several levels to handle priorities)

What I would like to do is to write an expression like "1+1" into as the label a graphical box instead of having to create a lot of boxes in the graphical editor which would be awful since expressions may be kind of recursive (if I write 1+1+1+1+1+1+1+1 it gets to be that ugly that the concept of graphical editor doesn't makes sense anymore...)

So my question is : How do I get the Xtext expression that is written in my example file from the ecore object that represents this expression? And how can I get this expression as a Java String I could return to my graphical model?

Thanks!

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